from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Having no life; inanimate.
- adj. Having lost life; dead. See Synonyms at dead.
- adj. Not inhabited by living beings; not capable of sustaining life.
- adj. Lacking vitality or animation; dull: a lifeless party.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. inanimate; having no life
- adj. dead; having lost life
- adj. uninhabited, or incapable of supporting life
- adj. dull or lacking vitality
- adj. departed
from the GNU version of the Collaborative International Dictionary of English
- adj. Destitute of life, or deprived of life; not containing, or inhabited by, living beings or vegetation; dead, or apparently dead; spiritless; powerless; dull
from The Century Dictionary and Cyclopedia
- Deprived of life; dead; also, in a state of suspended animation.
- Not possessing life; inanimate; inorganic: as, lifeless matter.
- Destitute of power, force, vigor, or spirit; wanting animation or vital energy; dull; heavy; inactive; vapid; insipid: as, a lifeless style of oratory; lifeless movements.
- Destitute of living beings.
- Synonyms Defunct.
- Inert, torpid, sluggish, spiritless, passive; flat, frigid, pointless.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- adj. deprived of life; no longer living
- adj. lacking animation or excitement or activity
- adj. destitute or having been emptied of life or living beings
- adj. not having the capacity to support life
life + -less (Wiktionary)